Weird audio output

[danielpiet]

Hey everyone.
Often when i close my macbook pro retina and opens it again, the sound on my computer turns into something weird. Do anyone of you know how to fix it? you can hear how it sounds in the link http://www.4shared.com/music/yB9EW2cOce/Underlig_Lyd.html

 

[satcomer]

Try to reset your NVRAM/Pram and see if it helps.